Dump-car.



R. M. ZIMMERMAN.

DUMP GAR.

APPLIOATIDN FILED JUNE 9,1910.

Patented Mar. 26, 1912.

3 SHEETSSHEET 1.

wi meooeo COLUMBIA PLANO-GRAPH C0.,WASH1NGTON. D; c.

R. M. ZIMMERMAN.

v DUMP GAR. APPLIUATION FILED JUNE 9,1910.

Patented Mar.26,1912.

3 SHBETS-BHEET 2.

cnLuMBlA PLANQGRAPH co., WASHINGTON, u. c,

R. M. ZIMMERMAN.

DUMP GAR.

APPLICATION IILED JUNE 9,1910.

1,021,286. Patented Mar.26, 1912.

3 sHETssHEET 3.

CCILUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

ROBERT MONTAGUE ZIMMERMAN, 0F MONTREAL, QUEBEC,

NATIONAL DUMP CAR COMPANY, MAINE.

CANADA, ASSIGNOR TO OF CHICAGO, ILLINOIS, A CORPORATION OF DUMP-CAB.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed. June 9, 1910. Serial No. 566,090.

To all whom it may concern:

Be it known that ZIMMERMAN, of the city of Montreal, Province of Quebec,Canada, have invented certain new and useful Improvements in Dump-Cars;and I do hereby declare that the following is a full, clear, and exactdescription of the same.

My invention relates particularly to dump cars of the type having fixedbodies presenting a single hopper-like discharge opening and gravitydischarge doors hinged to the side edges of the said opening, and theinvention may be said to consist of the construction, combination, andparticular arrangement of parts hereinafter described and pointed out inthe claims. For full comprehension, however, of my invention reference:must be had to the accompanying drawings forming a part ofv thisspecification in which similar reference characters indicate the sameparts and wherein- Figure 1 is a transverse vertical sectional view of acar constructed according to my invention, the section being taken online A A Fig. 3. Fig. 2 is a side elevation thereof drawn to a smallerscale one end of the car being shown in longitudinal vertical sectionalview; Fig. 3 is a plan view of the underside of the car; and Fig. i isan enlarged detail view illustrating the connection between one of thedoor operating parts and the door to which it is connected.

' The body of the car illustrated comprises a floor frame consisting ofa pair ofside sills b longitudinal intermediate sills 0, end

thereof and each presenting tread surfaces m n, the former (m) incliningupwardly toward the hinged sides of the doors, and the latter ('n)inclining upwardly toward the free sides thereof, and when the doors I,ROBERT MoN'rAoUn renewal of some of these sltated, the pitmen 'w areconstructed of 1 consisting of plates also form but of irregularconfiguration presentare in closed position converge slightly toward thesupporting rails 0 suspended from the floor framing, the rails 0inclining upwardly toward the center of the car.

The doors are operated by laterally movable shafts p p supported on therails o, in conjunction with such rails, the rails on the underside ofthe doors, and unitary gear operatively connected to both doors andcomprising the following mechanism.

the side and intermediate transverse sills b and 0 respectively, supportan oscillatory shaft 8 having mounted: rigidly thereon two pairs ofcrank arms 23 t and u u, respectively, equally spaced from the ends ofthe shaft with the arms 6 2? near the ends. These arms 23 t areconnected to the shafts p by pitmen 4) extending past the ends of thedoor i outside of the vertical planes of both doors, and the arms a areconnected to the shaft 2 by shorter pitmen to extending beneath the doore'.

For simplicity in building and to provide for ready repairs in the eventof the parts being necesplates w bent to channel form and havin clevisesw riveted to one end thereof an through which shaft 39 passes, thepitmen v bent tov channel ing one end '0 of less width than the other,the narrow end having riveted thereto a plate 0 with a hole '0 through 1p passes. sills d, and intermediate transverse sills e.

The arms a and t are connected to the opposite ends of these pitmen bymeans and 0* and holes to in the'pitmen 10 and slots '0 the pitmen o.The object of this slot and pin connection is to 'permit the operator tostart one door before the other, thereby facilitating the closingaction. The particular configuration of the pitmen 0 is to accommodatethe ends of the shaft 19 during operation, and perinit of a largerdischarge opening for a given length of car, while the slots in thepitmen permit the door j, operated thereby to follow the door 1 toclosed position.

The shaft .9: is rotated by a ratchet wheel 2 mounted rigidly thereonand a lever 3 fulcrumed on such shaft and carrying a weighted pawlengaging the ratchet wheel, while a detent pawl 5, engaging a secondwhich shaft A series of bearing straps r suspended from tory members,

ratchet wheel 6 upon the shaft s locks it against retrogression.

Operation: The doors are illustrated closed and the members of theoperating gear in position retaining them closed, and, in dotted lines,open. To move the doors from open to closed position, the ratchet andpawl mechanism is operated in a manner to rotate the shaft in thedirection of arrow 10 thereby swinging the arms 5 and u to the positionsshown in full lines and pushing the shaft go under compressive forceexerted in' the pitman w and pulling the shaft 79 under tensional forceexerted in pitman '0 until both shafts are stalled by the doors cominginto tight contact with the frame of the discharge opening. In thecommencement of the operation of closing or opening the doors, the door71, as before mentioned, leads the door 7' but catches up to it andfinishes its movement to either extreme position simultaneouslytherewith.

What I claim is as follows 1. In a car having a discharge opening, thecombination with a pair of doors controlling the said discharge opening,of a pair of oscillatory members movable on a common axis, means wherebythe said members are oscillated, reciprocatory members operated by thesaid oscillatory members, and means operatively connecting the saidreciprocatory members to the doors, including a pair of laterallymovable shafts, a plurality of rails supporting the shafts, and aplurality of rails carried by the doors and inclined thereto and adaptedto be engaged by the said shafts.

2. In a car having a discharge opening, the combination with a pair ofdoors controlling the said discharge opening, of a pair of oscillatorymembers, means whereby the said members are oscillated, reciprocatorymembers operated by the said oscilla and means operatively connectingthe said reciprocatory members to the doors, including a pair oflaterally movable shafts, a plurality of inclined rails supporting theshafts, and a plurality of rails carried by'the doors and each having apair or rail surfaces incliningin opposite directions toward the doorsand adapted to be successively engaged by the said reciprocatorymembers, for the purpose set forth.

3. In a car having a discharge opening,

the combination with a pair of doors con-- trolling the said dischargeopening and adapted to open away from each other, of operating mechanismfor such doors, including a pan of laterally reciprocating shafts, aplurality of rails supporting each of the shafts, and a plurality ofrails carried by the doors and inclined thereto and adapted to beengaged by the'said shafts.

4. In a car having a discharge opening in its bottom, the combinationwith a pair of doors hinged at the side edges of the said opening andhaving their free edges meeting when the doors are closed, of anoscillatory shaft at one side of the opening; bearing plates supportingthe said shaft; inclined shaft supporting rails located below the levelof the doors; inclined rails upon the under side of the doors; a pair oflaterally movable shafts resting upon the said support ing rails andhaving the rails upon the doors bearing thereon; two pairs of armscarried by the oscillatory shaft; pitmen of difierent' lengthspivotally'connected at their opposite ends to the said arms andlaterally movable shafts; and means for oscillating the said oscillatoryshaft.

5. A car comprising side sills, end sills, intermediate longitudinal andtransverse sills forming a frame, hopper walls supported with theirlower edges connected to the frame, a pair of doors hinged to the saidlongitudinal intermediate sills and having their free edges meeting whenthe doors are closed, of an oscillatory longitudinal shaft at one sideof the said frame; bearing plates suspended from the transverse sillsand supporting the said shaft; inclined shaft supporting rails suspendedfrom the sills and located below the level of the doors; inclined railsupon the underside of the doors; a pair of laterally movable shaftsresting upon the said supporting rails and having the rails upon thedoors bearing thereon; two pairs of arms carried by the oscillatoryshaft; pitmen of different lengths pivotally connected at their oppositeends to the said arms and laterally movable shafts; and means foroscillating the said oscillatory shaft.

6. In a car having a discharge opening in its bottom, the combinationwith a pair of doors hinged at the side edges of the said opening andhaving their free edges meeting when the doors are closed, of anoscillatory shaft at one side of the opening; bearing plates supportingthe said shaft; inclined shaft supporting rails located below the levelof the doors; inclined rails upon the underside of the doors; a pair oflaterally movable shafts resting upon the said supporting rails andhaving the rails upon the doors bearing thereon; two pairs of armscarried by the oscillatory shaft; pitmen of different lengths pivotallyconnected at their opposite ends to the said arms and laterally movableshafts and the pivotal connection between one of the doors and itspitman being slidable; and means for oscillating the said oscillatoryshaft.

In a car having a discharge opening in its bottom, ,the combination witha pair of opening and having their free edges meeting when the doors areclosed, of an oscillatory shaft at one side of the opening; bearingplates supporting the said shaft; inclined doors hinged at the sideedges of the said shaft supporting rails located below the level of thedoors; inclined rails upon the underside of the doors; a pair oflaterally movable shafts resting upon the said supporting rails andhaving the rails upon the doors bearing thereon; two pairs of armscarried by the oscillatory shaft; pitmen of different lengths pivotallyconnected at their opposite ends to the said arms and laterally movableshafts and the pivotal connection between one of the doors and itspitman including a slot; and means for oscillating the said oscillatoryshaft.

In testimony whereof, I have signed my name to this specification, inthe presence of 5 two subscribing witnesses.

ROBERT MONTAGUE ZIMMERMAN.

Witnesses:

STANLEY C. KING, JOHN A. OKEEFE.

Copies of this patent may be obtained for five cents each by addressingthe Commissioner of Patents,

Washington, I). G. i

